iOS 7 definitely sets the standard for beautiful mobile operating systems. Windows Phone is a close second. Anroid is just garbage though.
Kicksend in particular, and Reeder 2 to a lesser extent if you cropped out the iOS status bar looks far more like an Android app than iOS has been in the past.
Your opinion of Android UI appears to have been formed where parts of the operating system looked like this: http://gigaom2.files.wordpress.com/2010/12/youtube-android.p... whereas nowadays those same parts look more like this: http://www.blogcdn.com/www.engadget.com/media/2012/09/youtub... .